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The Day of Σ (Sigma) is a 25-minute long OVA included on the Mega Man Maverick Hunter X UMD animated by Xebec. It becomes available to the player once the game has been cleared once. The OVA, which serves as a prologue to the game itself, shows the events which lead directly to the beginning of the game and explains Sigma's reasons for rebelling humanity as well as X's powers.
Part One - Gone Berserk
The OVA begins with an operation of the Maverick Hunters trying to stop the rampage of a berserk Mechaniloid that is devastating a building. While Sigma, Zero and the rest of the 17th Unit are already on the ground securing the area, X is dispatched from an aircraft via drop point and delivers the first blow at the Maverick Mechaniloid. During the course of the attack at the Mechaniloid, the berserk robot manages to get hold of one of the Hunters holding him in front of itself in order to protect its already open power generator. X aims for the generator, yet hesitates to fire because of the other Reploid in the way. As he can't bring himself to shoot, Sigma takes action and uses his beamsaber to destroy the generator, cutting off one of the Reploids' arms in the process, thus shutting the Mechaniloid down.
After the Mechaniloid is defeated, X is scolded by Chill Penguin because of hesitation, claiming there would have been many more casualties if Sigma hadn't stopped the robot. While being carried away on a stretcher, the Reploid who was taken hostage tells X not to be hard on himself, citing it was his own fault for getting captured beforehand. Sigma himself then walks over to X, stating that X's aiming capabilities aren't any different from his own and that he easily could have destroyed the generator and there would have been only a small chance that the Reploid previously held hostage by the Mechaniloid would have been hit by the blast. He tells X that there are moments when Maverick Hunters cannot afford to hesitate in a dangerous situation and have to "pull the trigger" in order to save the many while endangering a few and that the Hunters have sworn to be both, sword and shield of those who are not capable of defending themselves.
Part Two - Hunter Base
The unit then returns to the Maverick Hunter HQ. As Zero and X walk inside the assembly hall, they hear two other Hunters talking about the current Maverick uprisings. X then asks what could cause someone to go Maverick and Zero explains that it's due to program errors and shortcuts in the brain of a Reploid which causes someone to go Maverick, the Reploid's unit processing power in general. At that moment, Vile, another member of the 17th Unit, is being brought down the corridor, cuffed and escorted by two Hunter officers.
In another part of the city, Sigma has come to visit Dr. Cain, reporting on this morning's Maverick attack. After being asked how X is doing among the Hunters, Sigma explains that he shows tremendous potential on the battlefield, however it's his worrying about others getting hurt that makes him hesitate when decisive action needs to be taken. Cain agrees, but states that it is his worrying which is also part of his potential and power. He explains to Sigma how he found X and how he utilized his blueprints to create the Reploids which can think and act on their own, yet X is the only one who worries about others, a problem that Sigma doesn't have. For Cain, this ability of worrying could be a new connection between robots and humans, but it is at this point unknown whether this will have a good outcome or not.
Back at the Hunter Base, Zero is reconstructing the earlier situation in which X hesitated to attack via hologram simulation. Rather than X, Zero takes point but hits the Reploid hostage instead of the Mechaniloid's generator, resulting in a 95% success as he only missed the generator slightly. He is then visited by Storm Eagle. The two of them have a short chat about Eagle's duty at the missile base before going back to the assembly hall in which the Operator is holding a briefing about the Mechaniloid attack and that it was most likely a hack attack caused by someone else. Actually, a Mechaniloid's security program shouldn't be so easy to hack, however the Operator states that there is a possibility that someone managed to crack the Hunter Base's systems in order to gain access to the Mechaniloid programs. They also identified one of the sources for the hack attack, which was on 16th Block of the East sector. This surprised Zero and X, due to it being in very close proximity to the Hunter HQ, before inquiring if Sigma had been aware of this. The head operator then informs them that she contacted Sigma regarding this, and that the latter ordered for X and Zero were to investigate. Afterwards, X and Zero are sent to another region of Abel City, from which one of the hack attacks was located.
Part Three - InvestigationAt Abel City East, 16th Block, a quiet, dark and lonely area of the city, X and Zero investigate the origin of the hack attack, only to find a large number of destroyed Reploids inside the building. The rest of the 17th Unit shows up to investigate the crime scene and the computers there, however all traces have been wiped out, appearing to be an inside job. Sigma arrives as well, asking Zero about what he would make out of the situation. He explains that no matter who did it, the attacker must have had incredible combat skills as every hit the dead Reploids received was directed at a weak spot. Without commenting on Zero's deduction, Sigma leaves and meets with Storm Eagle waiting outside. After nodding towards him, Eagle faces his men and orders them to search the area, as does Chill Penguin's team, leaving Sigma alone at the scene, with the blaring alarms ominously reflecting on his face.
The next day, another berserk Mechaniloid is causing mayhem in Abel City. While the Hunters dispatch in order to stop it, Sigma visits the imprisoned Vile, as Vile asks whether Sigma came to "reprimand [Vile] in person." At the same time, as X and Zero rush to the scene of the berserk Mechaniloid, they're given the orders to return immediately as Vile has just escaped from his cell. Once they arrive, they find a similar scene like the evening before, a hallway full of destroyed Reploids and Zero states that this couldn't have been Vile as he doesn't have that kind of attack capabilities. Zero then noted that the person who did this must have had extensive combat skills, only to flash back to his report to Sigma, causing him to realize that Sigma is the one responsible for both events. X then asks if the one who released Vile did so as part of a diversion.
Part Four - Missile Base
Finally, the Hunters managed to track down the location of the hack attack, the Missile Base. Upon arriving, they find Sigma being there as well. In order to hide the signal, the perpetrator used the security systems of the missile base to gain control of the Mechaniloids. Zero, while investigating, then tells Sigma that HQ wasn't able to get in contact with him, with Sigma telling Zero that he had earlier deactivated his comms to "maintain cover", before he ominously states that "none of that matters now." While checking the security terminals, Sigma walks towards Zero from behind, grabbing his saber from his waist. Immediately Zero is able to counter the upcoming attack. Sigma is impressed by Zero having it figured out by now and blocking his attack. Zero explains that only very few have the combat capabilities that precise to have taken out the dead Reploids found at the crime scenes this effectively. Sigma then explains that although he is definitely impressed at Zero's deductive reasoning skills, his admiration for X was the issue, due to X having limitless potential and thus being a great specimen for advancing Reploids.
Sigma then grabs Zero and holds him up, using him as a shield while X is aiming at him. Sigma states that this is exactly the same situation earlier by X before and again, X is hesitating. After taking out Zero with one swift slash of his saber, Sigma grabs the inattentive X, stating that he missed his last chance of stopping his scheme while picking a remote from his belt. After pressing a button on the remote, the bases entire content of missiles are being prepared to be launched, directed at Abel City. Deceiving X into (literally) disarming, he throws him away, stating that evolution requires sacrifices to be made, before firing the missiles in front of a horrified X. As X tries desperately to stop Sigma, the missiles destroy large parts of Abel City, one of them hitting Dr. Cain's laboratory, seemingly vaporizing the old man.
While impaled by Sigma's saber, X experiences a flashback from his time when he was still under construction by Thomas Light. Light explains that he chose the name "X" for him because it represents a variable in maths which can stand for any number and thus unlimited capabilities. At a later point (X is nearly finished except for his Buster), Light states that X is just like humans, but he fears that mankind is not yet ready to accept an artificial being that is so much like a human, as well as fearing his unlimited potential. At the last part of the flashback (X is now complete), Dr. Light apologizes for not being able to see X enter the world because of his age. Upon saying that he gave X the power to think, feel and evolve as he moves on, he states that it is too soon for such a being to be released, while setting up the capsule X is laying in. X promises to use the powers given to him to fight for justice and hope which makes Light cry slightly. Pleased by X's decision, he asks him to fight for the people of the future and guide them to peace before he seals X away.
When the flashback ends, X's unlimited potential is supposedly unleashed for a moment as his energy crystal and left hand begin to glow. He manages to get free of Sigma's hold before dashing at the Reploid, grabbing his face, giving Sigma his signature scars in the process. However, after this action, X seemly shuts down due to the enormous damage he has already taken. Pleased, Sigma comments on X's action and his potential. The OVA closes with Zero regaining consciousness and bringing X back to the Hunter Base while Sigma stares at the devastated city.
- A majority of the events that transpire in this OVA defies the original canon established by other installments in the X series: X and Zero are close friends from the beginning rather than the soldier and commander role they began as, Sigma choosing to go Maverick rather than becoming corrupted into a tyrant, the heavily debilitated state of Dr. Cain as well as his supposed death, etc. Due to this, some fans consider this non-canon. However, Capcom's plan was to make an entirely new canon altogether by remaking the whole series in such fashion; this plan was eventually scrapped due to MHX's poor sales.
- Zero and Storm Eagle are revealed to be friends and allies prior to Sigma's rebellion, referencing the Rockman X manga storyline.
- At the climax, when X unleashes his unlimited potential against Sigma, the attack he uses is exceedingly similar to the signature finishing attack of the Shining Gundam. As if to nod to this, X and the Shining Gundam's pilot, Domon Kasshu, have the same English voice actor.
- Also interesting to note that Sigma's voice actor (who did Sigma's voice from Mega Man X8) is also the voice actor for Master Asia from G Gundam as well.
- Sigma's line, "evolution requires sacrifice", is a nod to a line by the main antagonist of Mega Man ZX, Serpent.
- All the events in Maverick Hunter X took place in "Abel City". This is a reference to the Bible tale of Cain and Abel, the latter being killed by his brother. This is reflected in the story, Dr. Cain develops Reploids, which are the cause of the destruction of "Abel City".
- Sigma unveiling himself as the Maverick responsible for the attacks at the abandoned Missile Base and his overall interactions with X and Zero during this time resembles the situation of S.T.A.R.S. Captain Albert Wesker unveiling himself as the mole to the Umbrella Corporation to Chris Redfield and Jill Valentine at the Umbrella Lab underneath the Spencer Mansion in the first game of fellow Capcom series Resident Evil.
|Mega Man Maverick Hunter X|
|Mega Man X • Vile|
|List of Mavericks|
| Chill Penguin • Spark Mandrill • Armored Armadillo • Launch Octopus |
Boomerang Kuwanger • Sting Chameleon • Storm Eagle • Flame Mammoth
| Vile • Bosspider • Rangda Bangda • D-Rex • Velguarder • Sigma |
X • X and Zero
|Mega Man X's Special Weapons|
| Shotgun Ice • Electric Spark • Rolling Shield • Homing Torpedo |
Boomerang Cutter • Chameleon Sting • Storm Tornado • Fire Wave
| -Arm Weapons-|
Vulcans • Missiles • Rocket Punches
Cannons • Lasers • Cutters
Napalms • Balls • Flamethrowers
|Armors and Upgrades|
| - Mega Man X -|
Frozen Castle • Speed Devil
| Damage Data Chart (X) • Damage Data Chart (Vile) |
Mega Man Maverick Hunter X Script (X's story) • Mega Man Maverick Hunter X Script (Vile's story) • The Day of Σ Script